Ha ha - thanks for picking me up on the label confusion (I knew RCA were involved at some point, but where I got Arista from I have no idea. I have read a few rock biographies lately so my mind is mush :-))
Thanks for the recommendations - very useful on the Calvert years as this is likely my next investigation (I try to keep things chronological).
Will definitely consider Quark... but am very very tempted to Hawklords - the 2CD Atomhenge version with the Sonic Assassins outtakes looks great